In a large bowl cream together the butter and both sugars until fluffy. Beat in the egg and vanilla. Add in the flour, baking powder and salt. Mix until just combined.
The dough will be very crumbly.
Add half the M&M's, mini chips, and sprinkles to the dough. Reserve the remaining.
Using a small/mini cookie scoop, divide and roll the dough into 36 balls. Roll/press in remaining toppings and place dough balls on a parchment lined baking sheet. Refrigerate for at least 30 minutes.
Bake the cookies at 350° F for about 8 minutes. You want the edges to be just barely turning golden brown, so the cookies stay chewy.
Cool 5 minutes on the baking sheet and then transfer to a wire rack to cool completely.
Notes
This recipe can make 36 mini cookies (pictures), 12 regular size cookies, or 6 giant cookies.
While these only need to chill for a bit before baking you can make them the day before and chill them in the fridge until you are ready to bake them the next day.
Store in an airtight container at room temp for up to 5 days
Calories are automatically generated. For best results calculate based on your exact ingredients.